break in after piston/cylinder replacement

[sixteenacrewood]

I have replaced the piston, cylinder on my Dolmar 9010. the rubber intake had a tear in it and I think it leaned out the mix and scored the p/c and melted the rings. The work went smoothly
I also got a tachometer for tuning.

Is there a breakin procedure I should follow?

This saw will see heavy use on a 64" alaskan mill. I am a professional woodworker and have 6 very large trees to mill for a project and need to get it going asap.

Any advise would be helpful

Thanks
Steve

 

[mtngun]

Only thing special I do for break in is tune it a little richer than normal, 11,500 - 12,000. It tends to gain rpms as it breaks in. A couple of tanks like that, then let it rip.

Hope you leak tested it ?

 

[sixteenacrewood]

Thanks again Mtngun

When you brought the leak test up on my earlier post I went out and got a vacume pump and leak tested, i pumped it up to 10 and it held for a while, I rotated the crank and checked it after 1 hour, it had bled down to 9.
Then I pressure tested to 5 psi, and sprayed everything with soapy water but nothing bubbled, and the pressure held for about an hour.

even though the vacumn test wasn't perfect I am hoping I am ok

I'll set the rpm like you said and see how she runs cross cutting some firewood logs before I start milling.

thanks again

 

[hamish]

With vac and pressure tests a bleeddown of no more than 2psi/hg over 30 seconds is usually suffice. But I to like comming back in the next morning and have the gauge still reading where it was when i left the day before.

Your gonna be fine. If its a dedicated milling saw, consider cutting up some firewood for the first few tanks, to avoid the sustained high rpm milling cut, do give the rings a chance to settle in.